Which should be done first?

Has anyone here got it done?

 

The bottom one looks like an FabSpeed X Pipe. I have the same one going on. I rather start with a little increase and burble than loud. You can always add more. I plan on putting it on once I get back home in two weeks. From what I gave been told it adds another level of sound and burble. Not a ton but a nice addition. Sorry but that's all I have,wish I had more to give.

 

The Fabspeed Center Muffler Bypass X-Pipe will give you a little more of an aggressive tone, but nothing over the top loud.

If you are looking for something with a much louder tone and a more aggressive growl overall, you will want the supersport x-pipe:

http://www.fabspeed.com/porsche-991-...xhaust-system/

 

I wish Fabspeed made the center muffler bypass x-pipe with valves, so I could still use the button to make it loud or quieter when needed.

 

I have a center muffler/mufflers x-pipe delete with valves and absolutely LOVE it!

 

We typically like to start with the X pipe - then go from there.

It's a modular setup, so if you change out the X- pipe and then decide that you want even more, you can still alter other parts of the exhaust system.

The Fabspeed unit is a great - functional piece , looks great, and is made in the USA.

Can't ask for much more than that!

- Jason

 

I did the Fabspeed X-pipe on my 997.2 and it was just right!

 

Hello. I made the big mistake of doing both deletes at one point. What a total disaster it was! Absolutely un-driveable! WAY TOO LOUD AND ANNOYING!!!!! BIG HOLE IN MUFFLER, UNREFINED, JALOPY, P.O.S., WAKE UP THE NEIGHBOURS, EXPLOSIONS, LOUD !!! At first I started out with the Fabspeed X-pipe which I liked, especially since I could feel power gain in my butt dyno, but I wanted a slightly louder, and deeper tone. My stupidity led me to believe that combining it with Sharkwerks would be a good idea despite advise from Sharkwerks cautioning me that I might be too loud (which I found out the hard way was an understatement). Once I added the SW side mufflers bypass, I could not wait to have one of the bypasses removed and proceeded to do so the very next day. At the end of the day, I finally kept the Sharkwerks with my original non-PSE centre. To me it is AWESOME!!!!! Nice, deep sound and no drone. On highway cruising, I can talk on my cell phone with no issues. When driving aggressive, it is music to my ears. Please take this word of advice, do NOT put both on at the same time! Don't do it! You will definitely regret it!!!!!! For sure I did, and I learned my lesson well. I probably spent triple the cost of what it should have cost after all the labour costs buying and reselling the unused parts involved. If anything, buy the Fabspeed X-pipe along with the Fabspeed side cans, but don't by-pass the entire system. If you search both forums, I have written other posts about my personal experience playing with the two different exhaust setups on my 991. Good luck!

 

Here's the deal with mufflers, guys. Your 991 has three, the center and then side mufflers in each fenderwell. If you look at the engineering of controlling noise from an engine you MUST have a collector box to dampen and channel the sound, otherwise you are going to get boom and drone. That collector box is what we call a muffler. On a rear-engined car, its more challenging to make a good exhaust as you don't have the pipe run to the back like you do with a front engined car. The challenge then becomes packaging at a specific noise db while seeking a pleasant tone your customer expects, and thousands of man hours go into the engineering per model. Mandates require production cars to have threshold noise factors, and for many they are too quiet - we like some rumble to our cars (I do as much as the next guy). In the aftermarket, you don't have the db restrictions and can do what you please, subject to the cops and track meters at driving events.

The cheap and easy way is to remove the center muffler on the 991, leaving the two sides and many have done this. In effect you are creating a straight pipe where the muffler used to live, no matter whose you buy. YES - your sound volume is going to go up for sure, but you have also removed a resonance chamber so now you are going to experience an increase in both drone and resonance into the cabin. Maybe you will like it and maybe you won't - but its going to happen, that's the physics of it all in spite of what any vendors will tell you that are trying to sell you a crosspipe. This drone/resonance can be particularly annoying if you take long runs in the car (who drives full throttle on the interstate for hundreds of miles?) or like to conduct hands free bluetooth business calls. You have to decide on that and if its tolerable. For me, its not - but I'm an old fart and have owned too many cars that drone on the highway. I want my noise when I want it, but not all the time.

Now, a full aftermarket exhaust that replaces the entire factory exhaust is superior because it keeps all the mufflers and changes the baffling inside the chambers. You don't get ANY drone whatsoever from a well-designed aftermarket system but its going to cost you much more than a straight pipe. And when you lay on the gas - they sound marvelous. In cruise mode at a steady rpm they are no louder than stock for the most part.

I had a X-Pipe on my car briefly. I really did not like it. I would have liked to have bought the Akrapovic system, but it was too rich at $ 9,500. I did buy the Tubi at $ 4,500 and am really happy with it, its perfect for my kind of driving. Yes, I cringed at that price too, but its far superior to any X-pipe layout. Choose wisely.

 

Thanks for all the helpful inputs guys!

Since my 991s is not a DD and I won't mind a little drone, I'm going for the the X-pipe. Will post results after I get it.